Stop with dairy products

I love starting my day with some Greek yoghurts or corn flakes with milk. I drink my coffee with milk as well few times a day, love milkshakes and even my cocktails while drinking in the bars are mostly milk based.
I think I might be lactose intolerant btw:)
I mean I never checked but let me stop here and don't get into details of what happens to my body when I consume too much.
That's why I think it would be great to stop with dairy entirely for some time. It won't be easy tho...